ISL78420 INTERSIL [Intersil Corporation], ISL78420 Datasheet

ISL78420

Manufacturer Part Number

ISL78420

Description

100V, 2A Peak, Half-Bridge Driver with Tri-Level PWM Input and Adjustable Dead-Time

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.ISL78420.pdf (16 pages)

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL78420ARTBZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

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100V, 2A Peak, Half-Bridge Driver with Tri-Level PWM

Input and Adjustable Dead-Time

ISL78420

The ISL78420 is a 100V, high frequency, half-bridge MOSFET

driver with a tri-level PWM input. This part is a derivative of the

HIP2121 half-bridge driver. The non-automotive version of the

ISL78420 is the HIP2124.

This driver is designed to work in conjunction with the ISL78220,

“6-Phase Interleaved Boost PWM Controller with Light Load

Efficiency Enhancement”. Equally, it can be used in most

applications where a half-bridge driver is used.

This driver has a programmable dead-time to ensure

break-before-make operation between the high-side and low-side

drivers. A resistor is used to adjust the dead-time up to 220ns.

The tri-level input allows the PWM input to also function as a

disable input. When the PWM input is a logic high, the high-side

bridge FET is turned on and the low-side FET is off. When the

input is a logic low, the low-side bridge FET is turned on and the

high-side FET is turned off. When the input voltage is midrange,

both the high and low-side bridge FETs are turned off.

The enable pin (EN), when low, drives both outputs to a low state.

This input is used when the controller does not utilize a tri-state

output. All logic inputs are V

Two package options are provided. The 10 Ld 4x4 DFN package

has standard pinouts. The 9 Ld 4x4 DFN package omits pin 2 to

comply with 100V conductor spacing per IPC-2221.

September 24, 2012

FN8296.1

CONTROLLER

PWM

HALF BRIDGE

FIGURE 1. TYPICAL APPLICATION

PWM

VDD

RDT

VSS

ISL78420

EPAD

tolerant.

100V MAX

FEEDBACK

ISOLATION

SECONDARY

CIRCUITS

WITH

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

Features

• Programmable break-before-make dead-time prevents

• Bootstrap supply maximum voltage to 114VDC

• Wide supply voltage range (8V to 14V)

• Supply undervoltage protection

• On-chip 1Ω bootstrap diode

• Unique tri-level PWM input logic enables phase shedding when

• 9 Ld TDFN “B” package compliant with 100V conductor

• AEC-Q100 Qualified

Applications

• Automotive applications

• Multi-phase boost (ISL78220/225)

• Half-bridge DC/DC converter

• Class-D amplifiers

• Forward converter with active clamp

Related Literature

•

shoot-through and is adjustable up to 220ns

using multi-phase PWM controllers (e.g. ISL78220/225)

spacing guidelines per IPC-2221

FN7668

Half-Bridge Drivers with Adjustable Dead Time Control and

PWM Input”

FN8363

Tri-level Input and Adjustable Dead Time” (non-automotive)

FN7688

Controller with Light Load Efficiency Enhancement”

FN7909

Controller with Light Load Efficiency Enhancement”

200

160

140

120

100

All other trademarks mentioned are the property of their respective owners.

HIP2120, HIP2121 “100V, 2A Peak, High Frequency

HIP2124, “100V, 2A Peak, Half Bridge Driver with

ISL78220, “6-Phase Interleaved Boost PWM

ISL78225, “4-Phase Interleaved Boost PWM

FIGURE 2. DEAD-TIME vs TIMING RESISTOR

(kΩ)

48 56

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